[alsa-devel] [PATCH v3] ASoC: rt286: add jack detection enable/disable APIs and export

[Jie Yang]

Some platforms, e.g. WSB, don't need jack detection when
system is in Suspend, for power save reason.

Here add jack detection enable/disable APIs and export them, when
disabled, it will ignore interrupt, and disable LDO1, which is
used for jack detection when headphone is plugged in.

Signed-off-by: Jie Yang <yang.jie at intel.com>
Reviewed-by: Bard Liao <bardliao at realtek.com>
---
 sound/soc/codecs/rt286.c | 29 +++++++++++++++++++++++++++++
 sound/soc/codecs/rt286.h |  2 ++
 2 files changed, 31 insertions(+)

diff --git a/sound/soc/codecs/rt286.c b/sound/soc/codecs/rt286.c
index d5cc1bc..1a0c250f 100644
--- a/sound/soc/codecs/rt286.c
+++ b/sound/soc/codecs/rt286.c
@@ -402,6 +402,33 @@ int rt286_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack)
 }
 EXPORT_SYMBOL_GPL(rt286_mic_detect);
 
+int rt286_enable_jack_detection(struct snd_soc_codec *codec, struct snd_soc_jack *jack)
+{
+	struct rt286_priv *rt286 = snd_soc_codec_get_drvdata(codec);
+
+	if (!jack)
+		return -EINVAL;
+	rt286->jack = jack;
+	if (jack->status | SND_JACK_HEADPHONE)
+		snd_soc_dapm_force_enable_pin(&rt286->codec->dapm, "LDO1");
+	snd_soc_dapm_sync(&rt286->codec->dapm);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt286_enable_jack_detection);
+
+int rt286_disable_jack_detection(struct snd_soc_codec *codec, struct snd_soc_jack *jack)
+{
+	struct rt286_priv *rt286 = snd_soc_codec_get_drvdata(codec);
+
+	if (!jack)
+		return -EINVAL;
+	rt286->jack = NULL;
+	snd_soc_dapm_disable_pin(&rt286->codec->dapm, "LDO1");
+	snd_soc_dapm_sync(&rt286->codec->dapm);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt286_disable_jack_detection);
+
 static int is_mclk_mode(struct snd_soc_dapm_widget *source,
 			 struct snd_soc_dapm_widget *sink)
 {
@@ -1012,6 +1039,8 @@ static irqreturn_t rt286_irq(int irq, void *data)
 	bool mic = false;
 	int status = 0;
 
+	if (!rt286->jack)
+		return IRQ_HANDLED;
 	rt286_jack_detect(rt286, &hp, &mic);
 
 	/* Clear IRQ */
diff --git a/sound/soc/codecs/rt286.h b/sound/soc/codecs/rt286.h
index 7130edb..d793185 100644
--- a/sound/soc/codecs/rt286.h
+++ b/sound/soc/codecs/rt286.h
@@ -200,6 +200,8 @@ enum {
 };
 
 int rt286_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack);
+int rt286_enable_jack_detection(struct snd_soc_codec *codec, struct snd_soc_jack *jack);
+int rt286_disable_jack_detection(struct snd_soc_codec *codec, struct snd_soc_jack *jack);
 
 #endif /* __RT286_H__ */
 
-- 
1.9.1